-LRB- CNN -RRB- Chelsea underlined its title credentials with an attacking masterclass against Swansea , Saturday .

The London club moved five points clear at the top of the English Premier League table with a 5-0 victory at the Liberty Stadium .

With less than a minute on the clock , Oscar fired the table toppers into the lead to ignite the goal rush .

Diego Costa -- the leading scorer in the EPL with 17 goals -- added two more before Oscar bagged his second just before halftime .

After goals galore there was only a single strike from Andre Schurrle to savor after the break . The German winger came off the bench to make it five for Chelsea .

`` The result is impressive , '' manager Jose Mourinho told Chelsea TV . `` The performance was very good , very solid and very enjoyable . ''

The free flowing display by Mourinho 's men was a warning to those threatening to deny Chelsea its first title since 2010 .

Manchester City , the defending champions , will aim to close the gap when it faces Arsenal Sunday .

Elsewhere , hirsute substitute Marouane Fellaini broke the deadlock against Queen 's Park Rangers to help earn Manchester United a 2-0 victory .

The Belgian hammered home a 10-yard strike before James Wilson sealed victory late on .

QPR once again relied upon the efforts of the lively Charlie Austin , who was tireless in his pursuit of an equalizer , but the West London club remain mired in the relegation tone .

The club 's unflappable manager Harry Redknapp shrugged off any worries , telling Sky Sports : `` QPR wo n't go down this year . ''

In the EPL 's late game , Southampton moved into third place thanks to a 2-1 away victory at Newcastle .

January on loan signing Eljero Elia scored both goals , his first for the club , in a sizzling performance .

Elsewhere , in form French forward Alexandre Lacazette scored his 20th goal in 21 Ligue 1 matches to stretch Lyon 's league lead .

Lyon left Lens with a 2-0 victory -- Jean-Phillippe Gbamin added an own goal with an errant back heel -- to move four points clear of Marseille at the top of the table .

Lacazette is closing in on Josip Skoblar 's Ligue 1 record of 44 goals scored in a single season which he set back in 1970-1971 .

In Italy 's Serie A , title challengers Roma could only close to within two points of leaders Juventus -- who meet Verona Sunday -- after being held by Palermo .

Striker Mattia Destro salvaged a point for Roma after Argentina 's Paulo Dybala had put the home side ahead .

Inter Milan 's hopes of qualifying for the Champions League took another knock as Robert Mancini 's side slid to ninth after a goalless draw at Empoli .

In Spain , Valencia moved above La Liga champions Atletico Madrid and into third on goal difference after a 3-2 win over Almeria .

Diego Simeone 's men face Granada Sunday when leaders Real Madrid and pursuers Barcelona are also in action .

David Moyes tasted his first home defeat as Real Sociedad manager as his side lost 1-0 to Rayo Vallecano .

The former Manchester United boss has guided Sociedad to just two wins in eight league games since taking over the reins .

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Chelsea ticks off an easy 5-0 win on the road against Swansea

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Jose Mourinho 's men move five points clear at top of English Premier League

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Oscar and Diego Costa score two goals apiece